Mesochorus flavoorbitalis, Riedel, 2018

Riedel, Ravenhorst Matthias, 2018, Contribution to the Palaearctic species of Mesochorus G (Hymenoptera, Ichneumonidae, Mesochorinae): 1. The M. fulvus-group, Linzer biologische Beiträge 50 (1), pp. 687-716 : 693

Mesochorus flavoorbitalis nov.sp. ( figs 9-13 )

Holotypus: (♀) TRBurdur 1650m Dirmir, 07.07.2004, leg. J. Kolarov (Munich).

Paratypes: (♀) similar label (Munich); (♀) Kirgisistan, Alaj Gebirge, Majdan-Schlucht, 2000-3000 m, 10.-11.VII.1997, leg. W. Dolin (Munich); (♂) Turkey: Mugla, Univ. campus, 700 m, 37 ° 09N 28 ° 22E SW-PT, Bartak + K, 1-10.V.2013 (Linz).

Description: ♀: Bodylength 6-6.5 mm. Flagellawith 40-44 segments; 1 st flagellomeres length 5.8-6.1x width and 0.67x eye length; 2 nd flagellomeres length 3.5- 3.7x width. Temples moderately and roundly narrowed behind eyes, length 0.75x eye width. OOD 0.9-1.0. Face with coarse dense punctures, wide, sides slightly divergent ventrally, width 1.25-1.3x length of clypeus+face and 1.0-1.1x eye length. Clypeus with scattered punctures. Frons smooth, with scattered punctures; vertical orbits distinctly punctate. MI 0.2. Mandibles with two equal teeth. Malar spaces distinctly striate. Occipital carina complete medially (sometimes weak). Genal carinae reach the hypostomal ones far from mandibular bases. Mesoscutum densely punctate caudalmedially, with superficial punctures laterally; mesopleura with coarse dense punctures; metapleura with fine and moderately dense punctures. Area basalis trapezoid, length 1.5x width, confluent with area superomedia; area superomedia length c.1.8x width and 1.35x length of area petiolaris, costula in the middle; area petiolaris length 0.9-1.0x width. Hind femora length 4.3-5.3x height; hind metatarsi length 0.5x length of hind tibiae; hind claws with 5-6 long teeth in basal 2/3; distal fore tarsomeres slightly swollen, length 2.5- 2.6x width. Areolets shortly stalked; 2 nd recurrent veins proximal to their middle; nervuli interstitial; postnervuli intercepted in basal 0.3-0.4; pterostigma length 3.1-3.2x width, radial veins in their distal 0.7. 1 st tergite length 2.7x width; postpetiole length 1.5x width, sometimes with few rugae; 2 nd tergite length 0.9x width. Ovipositor sheaths length 6.3- 7.5x height and 0.9x length of hind metatarsi.

Colour: Yellowish-red (including ocellar space and ovipositor sheaths). Palps, mandibles except teeth, genae, clypeus, wide facial and frontal orbits, tegulae, hind edges of pronotum, wing bases, fore coxae and trochanters cream-yellow. Pterostigmata hyalineochreous, margins slightly darker.

♂: Bodylength 6.5 mm. Flagellawith 41 segments. Temples wide, slightly widened behind eyes, and moderately narrowed apcially, length c.0.8x eye width. OOD 1.2. Hind femora length c.4.9x height. Claspes long, stab-shaped, slightly clubbed apically, length c.1.3x length of 2nd hind tarsomeres.

Colour: Yellowish-red. Palps, mandibles except teeth, clypeus, face, inner orbits, malar spaces and genae yellow. Frontal margin and hind edges of pronotum, tegulae, subtegular ridges and wing bases cream-yellow. Legs reddish-yellow; fore and middle coxae and all trochanters pale-yellow. Pterostigmata hyaline-ochreous.

Hosts unknown.

Distribution: Kirgizistan, Turkey.

Figures

Figs 9-13: Mesochorus flavoorbitalis nov.sp. ♀ (holotypus): (9) face, (10) propodeum, (11) distal fore tarsomere, (12) head, (13) ovipositor sheaths.